CN-122000993-A - Wind-solar energy storage integrated energy supply system facing offshore island and application thereof

CN122000993ACN 122000993 ACN122000993 ACN 122000993ACN-122000993-A

Abstract

The invention provides an offshore island wind-solar-energy-water source supply system and application thereof, and particularly relates to the technical field of renewable energy comprehensive utilization and island energy supply. The system comprises auxiliary equipment, a wind-solar power generation module, an RSOC module, a gas storage and hydrogen storage module, a central heating module, a seawater desalination module and a control system, wherein the wind-solar power generation module is used for converting wind energy and solar energy into electric energy, the RSOC module is used for supplementing electricity to a sea island power grid or supplementing hydrogen to the gas storage and hydrogen storage module and supplying oxygen to a sea island cultivation area, the gas storage and hydrogen storage module is used for storing hydrogen and external natural gas and supplying hydrogen and gas to the RSOC module and/or the central heating module, the central heating module is used for supplying heating heat for residents in a sea island, the seawater desalination module is used for converting seawater into fresh water for living production, and the control system is used for ensuring cooperative operation of the modules and self-regulation of application modes. The invention integrates wind power and photovoltaic power generation, renewable energy hydrogen production, gas storage and hydrogen storage, sea water desalination, heating and other integrated supplies, and realizes clean production, efficient conversion and multi-element utilization of island energy.

Inventors

LUO YUN
LIU HAOCHEN
JIANG WENCHUN
CUI TIANYI
Xie Jishan
HUANG ZHENGTIAN
ZHANG KERUI
FU TAO

Assignees

中国石油大学(华东)

Dates

Publication Date: 20260508
Application Date: 20260130

Claims (9)

1. The offshore island wind-solar energy-water source supply system is characterized by comprising auxiliary equipment and The wind-solar power generation module is used for converting wind energy and solar energy into electric energy and supplying power to the system and the island power grid; The RSOC module is used for supplementing electricity to the island power grid when the power consumption load is high, or supplementing hydrogen to the gas storage and hydrogen storage module and supplying oxygen to the island culture area when the power consumption load is low; The gas storage and hydrogen storage module is used for storing hydrogen generated by electrolysis and external natural gas and supplying hydrogen and gas to the RSOC module and/or the central heating module; the central heating module is used for supplying heating heat for island residents; The seawater desalination module is used for converting seawater into fresh water for life and production; and the control system is used for monitoring and ensuring the cooperative operation of all the modules and realizing the self-regulation and control of the application mode.
2. The offshore island wind and solar energy storage integrated energy-water source supply system of claim 1, wherein the auxiliary equipment comprises a transformer and a gas reformer.
3. The offshore island wind and solar energy storage integrated energy-water source supply system according to claim 1, wherein the wind and solar power generation module comprises a plurality of vertical axis wind turbines, a plurality of monocrystalline silicon photovoltaic panels, a combiner box and a lightning protection device; The vertical axis wind driven generator has the power of 15 KW/table, the single crystal silicon photovoltaic panel has the power of 300W/block, and the installation directions of the single crystal silicon photovoltaic panels are all south facing and the inclination angle is 30 degrees; and the plurality of vertical axis wind turbines and the plurality of monocrystalline silicon photovoltaic panels are all connected with the transformer through the junction box.
4. The offshore island wind and solar energy storage integrated energy-water source supply system of claim 2, wherein the RSOC module comprises a hybrid windowed RSOC stack, a stack controller, and a heat exchanger; The mixed window type RSOC electric pile comprises an SOEC mode and an SOFC mode, and the electric pile power is 50-60 KW; the waste heat channel of the mixed window type RSOC electric pile fuel electrode outlet manifold is communicated with the high-temperature medium side inlet of the heat exchanger; the positive and negative power terminals of the hybrid windowed RSOC stack are connected to a transformer through a power conversion device.
5. The offshore island wind and solar energy storage integrated energy-water source supply system according to claim 4, wherein the central heating module comprises a heat exchange tube network, a heating boiler and a temperature controller; the inlet of the heat exchange tube network is respectively communicated with the high-temperature medium side outlet of the heat exchanger and the high-temperature medium output end of the heating boiler; the temperature of water supply in the heat exchange tube network is controlled to be 50-60 ℃.
6. The offshore island wind and solar energy storage integrated energy-water source supply system according to claim 5, wherein the gas storage and hydrogen storage module comprises a hydrogen compressor, a high-pressure hydrogen storage tank and a plurality of compressed natural gas cylinders; The outlet sides of the natural gas cylinders are respectively communicated with a natural gas raw material inlet of the gas reforming device and a fuel gas inlet of the heating boiler; The gas inlet end of the hydrogen compressor is respectively communicated with a material channel of a fuel electrode outlet manifold of the hybrid window type RSOC electric pile and a pure hydrogen outlet of the hydrogen purification unit, the gas outlet end of the hydrogen compressor is communicated with an inlet of a high-pressure hydrogen storage tank, and the outlet of the high-pressure hydrogen storage tank is respectively communicated with the fuel electrode inlet manifold of the hybrid window type RSOC electric pile and a fuel gas inlet of a heating boiler; the total capacity of the compressed natural gas cylinders is 1000-1200 NM 3 .
7. The offshore island wind and solar energy storage integrated energy-water source supply system according to claim 4, wherein the sea water desalination module comprises a low-temperature multi-effect distillation device, a pretreatment filter and a fresh water tank; The inlet of the pretreatment filter is communicated with the seawater intake end, the outlet of the pretreatment filter is communicated with the inlet of a feeding main pipeline of the low-temperature multi-effect distillation device, the heat source inlet of the low-temperature multi-effect distillation device is communicated with the high-temperature medium side outlet of the heat exchanger, the fresh water collecting outlet of the low-temperature multi-effect distillation device is communicated with the inlet of a fresh water tank, and the outlet of the fresh water tank is communicated with the inlet of a domestic water pipeline through a water pump.
8. The offshore island wind and solar energy storage integrated energy-water source supply system of claim 7, wherein the control system comprises a controller, a pressure sensor, and a remote monitoring platform.
9. An application of an offshore island wind-solar-energy-water source supply system, which adopts the offshore island wind-solar-energy-water source supply system according to any one of claims 4-8, and is characterized by comprising the following four application modes: mode one and surplus green electricity hydrogen production and energy storage modes: When the electric quantity generated by the wind-solar power generation module is larger than the sum of island power load and system self-power supply, the RSOC module is switched to an SOEC mode to perform electrolytic water reaction, hydrogen generated by electrolysis is compressed and stored in a high-pressure hydrogen storage tank until the pressure in the tank reaches the upper limit value of 20Mpa of the storage pressure, and hydrogen production is stopped; Mode two, RSOC module power up mode: When the electric quantity generated by the wind-solar power generation module is smaller than the sum of island power load and system self-power supply, the RSOC module is switched to an SOFC mode to perform electrochemical oxidation power generation reaction of hydrogen, a high-pressure hydrogen storage tank provides reaction hydrogen for the RSOC module and reacts with oxygen in air in a mixed window type RSOC pile, the generated direct current is converted into 380V alternating current through a transformer, then electric power is supplemented to an island power grid, and meanwhile waste heat generated by the RSOC module is recovered; If the hydrogen storage in the high-pressure hydrogen storage tank is insufficient to meet the electrochemical oxidation power generation reaction, a plurality of compressed natural gas cylinders are utilized to supplement energy to the gas storage and hydrogen storage module through the gas reforming device, and the generated hydrogen is used for participating in the hydrogen electrochemical oxidation power generation reaction of the RSOC module; Mode three, waste heat heating and sea water desalination mode: (1) If the RSOC module waste heat cannot meet the heating temperature requirement, mixing the hydrogen in the high-pressure hydrogen storage tank and the natural gas in the compressed natural gas cylinder according to the proportion of 1:4, and then introducing the mixed hydrogen and the natural gas into a heating boiler for combustion until the heating temperature requirement is met; (2) All the waste heat generated by the RSOC modules in the spring, summer and autumn is transmitted to the sea water desalination module for fresh water conversion only; mode four, emergency energy replenishment mode: When continuous overcast and rainy windless weather of the island exceeds three days, the wind-solar power generation module cannot normally generate power, the island power grid is insufficient in power, the RSOC module is switched to an SOFC mode, the hydrogen storage amount in the high-pressure hydrogen storage tank is insufficient to support the electrochemical oxidation power generation reaction of the RSOC module, at the moment, a plurality of compressed natural gas cylinders are utilized to supplement energy to the gas storage and hydrogen storage module through the gas reforming device, the generated hydrogen is used for participating in the hydrogen electrochemical oxidation power generation reaction of the RSOC module, the generated direct current is converted into 380V alternating current through the transformer, and then power is supplemented to the island power grid until wind-solar resources are recovered to be normal, the control system is switched to a mode one or a mode two, and the hydrogen storage amount is gradually supplemented to the gas storage and hydrogen storage module; if the recovery waste heat generated by the RSOC module can not meet the heating requirement in winter, natural gas is directly introduced into the heating boiler for combustion, so that the heating temperature is improved.

Description

Wind-solar energy storage integrated energy supply system facing offshore island and application thereof Technical Field The invention relates to the technical field of renewable energy comprehensive utilization and island energy supply, in particular to an offshore island wind-solar energy storage integrated energy-water source supply system and application thereof. Background In China, a large number of remote islands are limited by geographical locations, technical conditions and cost investment, and cannot be connected to a land power grid. The islands depend on diesel power generation for a long time to meet the power requirements, and meanwhile, heating is realized by burning firewood and coal, so that the energy utilization efficiency is low, a large amount of carbon-smoke emission is generated, and serious pollution is caused to the surrounding ecological environment. Meanwhile, the traditional energy supply mode has the outstanding problems of limited energy supply total amount, poor power supply stability, high electricity consumption cost and the like, seriously influences the life quality of island residents, and restricts the sustainable development of island related industries. In addition, the island on the sea generally faces the dilemma of water shortage for life production, and the fresh water is difficult to obtain and high in cost. The island region has abundant renewable energy sources such as wind energy, solar energy and the like, and has great development and utilization potential. Therefore, the renewable energy hydrogen production technology, the energy storage system, the external gas supplementing technology and the sea water desalting technology are organically combined, the problem of double shortage of island energy and water source on the sea can be effectively solved, a clean, stable and efficient energy and water source supply solution is provided for the island, and the method has important practical significance and application value. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides an offshore island wind-solar-energy-water source supply system and application thereof, and the specific technical scheme is as follows: An offshore island wind-solar-energy-water source supply system comprises auxiliary equipment, a wind-solar power generation module, an RSOC module, a gas storage and hydrogen storage module, a central heating module, a sea island resident heating module and a control system, wherein the wind-solar power generation module is used for converting wind energy and solar energy into electric energy and supplying power to the system and a sea island power grid, the RSOC module is used for supplementing electricity to the sea island power grid when high electricity load is applied, or supplementing hydrogen to the gas storage and hydrogen storage module and supplying oxygen to a sea island cultivation area when low electricity load is applied, the gas storage and hydrogen storage module is used for storing hydrogen generated by electrolysis and external natural gas and supplying hydrogen and air to the RSOC module and/or the central heating module, the central heating module is used for supplying heating heat for sea island residents, the sea water desalination module is used for converting sea water into fresh water for life and production, and the control system is used for monitoring and ensuring the cooperative operation of the modules to realize the self regulation and control of an application mode. Preferably, the auxiliary equipment comprises a transformer and a gas reformer. The wind-solar power generation module comprises a plurality of vertical axis wind power generators, a plurality of monocrystalline silicon photovoltaic panels, a confluence box and a lightning arrester, wherein the power of the vertical axis wind power generators is 15 KW/platform, the power of the monocrystalline silicon photovoltaic panels is 300W/block, the installation directions of the monocrystalline silicon photovoltaic panels are all south facing and the inclination angle is 30 degrees, and the vertical axis wind power generators and the monocrystalline silicon photovoltaic panels are all connected with a transformer through the confluence box. The RSOC module comprises a hybrid window type RSOC electric pile, an electric pile controller and a heat exchanger, wherein the hybrid window type RSOC electric pile comprises an SOEC mode and an SOFC mode, the electric pile power is 50-60 KW, a waste heat channel of a fuel electrode outlet manifold of the hybrid window type RSOC electric pile is communicated with a high-temperature medium side inlet of the heat exchanger, and positive and negative power terminals of the hybrid window type RSOC electric pile are connected to a transformer through a power conversion device. The central heating module comprises a heat exchange tube network, a heating boiler and a temperature controller, wh